This dataset contains a unified GeoTiff with 50x50 meter cell size representing the bathymetry of the Charleston Bump off of the South Atlantic Bight, derived from data collected in 2000 by the NOAA Ship Whiting. NOAA's NOS/NCCOS/CCMA Biogeography Branch, in collaboration with the South Carolina Department of Natural Resources, as well as the NOAA Ship Whiting, and private sector partners, acquired singlebeam bathymetry data off the Charleston Bump from 03/25/2000 to 03/28/2000. Data was acquired with a hull-mounted Kongsberg Simrad Singlebeam echosounder. It was processed by interpolating a bathymetrical surface from feature class points using the spatial analyst natural neighbor tool with 9 neighbor cell radius. The raster surface was exported as a 50m GeoTiff.

Purpose:

This singlebeam data was processed as part of a mulitagency cooperative deep-sea coral assessment. The singlebeam component of the cruise was intended to both provide fine scale acoustic imagery of known deep coral sites, as well as serve as a nautical survey for charting purposes.

Note: NOT TO BE USED FOR NAVIGATION. These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch

Contact_Position: Project Manager - Deep Coral Project

Contact_Address:

Address_Type: mailing and physical

Address: 1305 East West Highway, SSMC4, N/SCI 1

City: Silver Spring

State_or_Province: MD

Postal_Code: 20910

Country: USA

Contact_Voice_Telephone: (301) 713-3028

Contact_Facsimile_Telephone: (301) 713-4384

Contact_Instructions:

Contact info is for CCMA general reception. Please ask for current Biogeography Branch project manager for the Deep Coral Project.

Data_Set_Credit:

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch, South Carolina Department of Natural Resources, Dr. George Sedberry, NMAO and the personnel and R/V Whiting

As the survey was not conducted to meet IHO standards, all users should independently analyze the dataset according to their own needs and standards to determine data usability.

Completeness_Report:

This GeoTiff is sourced from a CARIS gridded dataset. The original full-resolution singlebeam data was used to create a downsampled uniform-resolution CARIS BASE (Bathymetry Associated with Statistical Error) surface grid with a best depth component. The downsampled grid nodes from that depth surface were then exported and used to generate the ESRI Grid. Some positional shifts may have occurred between the original data points and the transformed grid.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch

Publication_Date: Unpublished material

Title: Raw Singlebeam Data

Geospatial_Data_Presentation_Form: vector digital data

Type_of_Source_Media: external hard drive

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20000325

Ending_Date: 20000328

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: Raw Singlebeam Data

Source_Contribution: Original raw full resolution dataset.

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch

For this project, data was collected aboard the NOAA Ship Whiting from 03/25/00 to 03/28/00. Singlebeam data were acquired in .all format with a hull-mounted Kongsberg Simrad singlebeam echosounder. Backscatter snippet collection was enabled. Line spacing for acquisition was three times the water depth, and data was retained out to 60 degrees from nadir. Heave, roll, pitch and heading correctors were collected using an Applanix POS/MV Model 320 V4 inertial measurement unit (IMU) and associated Trimble GPS antennas. Sound velocity profiles were acquired with a Seabird Electronics SeaCat SBE19P CTD profiler and processed using NOAA's Velocwin V8.85 software, then applied directly to the raw data. Positioning was obtained using Trimble Zephyr GPS receivers. Data was reduced to Mean Lower-Low Water (MLLW) using final approved tides from NOAA COOPS, based on National Water Level Observation Network (NWLON).

Process_Date: 2012

Process_Step:

Process_Description:

Raw .all data were converted and processed using CARIS HIPS v6.0 software, resulting in a CARIS HDCS format dataset with all correctors applied. Attitude and SWMB data was cleaned of fliers, and SWMB data was reviewed in subset mode by a NOAA contractor.

Source_Used_Citation_Abbreviation: Raw Singlebeam Data

Process_Date: 2012

Process_Step:

Process_Description:

After being submitted to CCMA by the contractor, CARIS HIPS v6.0 was used to generate a CARIS BASE surface (similar to a DTM), based on weighted swath angle, from the processed HDCS data. Then CARIS export tool "BASE Surface to ASCII" was used to export a point feature class in NAD83 UTM zone 17N.

Source_Used_Citation_Abbreviation: HDCS Processed Singlebeam Data

Process_Date: 2012

Process_Step:

Process_Description:

The feature class points were interpolated into a grid using ArcMap 10.0 with the spatial analyst natural neighbor interpolation tool, which generated a 50m DTM raster by weighting averages of 9 cell neighborhoods to create a smooth interpolated surface. The grid was exported as GeoTiff in the UTM North American Datum (1983) Zone 17 N.

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch

Contact_Position: Project Manager - Deep Coral Project

Contact_Address:

Address_Type: mailing and physical

Address: 1305 East West Highway, SSMC4, N/SCI 1

City: Silver Spring

State_or_Province: MD

Postal_Code: 20910

Country: USA

Contact_Voice_Telephone: (301) 713-3028

Contact_Facsimile_Telephone: (301) 713-4384

Contact_Instructions:

Contact info is for CCMA general reception. Please ask for current Biogeography Branch project manager for the Deep Coral Project.

Resource_Description: Downloadable Data

Distribution_Liability:

These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.